Organisers of the Paralympic Games were warned about problems over ticketing for wheelchair users two years before the event, The Times has learnt.

Jonathan Kaye, a disability consultant who had been advising Locog, said that he had offered the body an IT system that would enable people with mobility difficulties to book online, but it was turned down.

He approached Locog in mid-2010 after David Morris, one of their key disability advisers, died. “I said ‘Look, we’re in a tight spot here, is there anything I can do to help?’,” he said.